Anion-exchange resins including ion-exchange groups with at least two nitrogen groups, and methods of making and using same
US6248798A · kind A · utility
30Cited by
11References
6Claims
0Family size
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Key dates
| Filing date | Nov 23, 1998 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Nov 23, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J47/016
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Anion-exchange compositions are provided comprising anion-exchange functional groups comprising at least a first and a second nitrogen group, wherein the first nitrogen group is a quaternary amine and the second nitrogen group is selected from the group consisting of primary, secondary, tertiary or quaternary amines. Methods of making and using the compositions are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.